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Light guide plate, display device and detection method for printing positioning of light guide plate

A detection method and light guide plate technology, applied in the direction of light guide, optics, optical components, etc., can solve problems such as poor quality of display screen, dislocation deviation of dot printing position, waste, etc., so as to solve the problem of difficult detection of printing positioning, improve the yield rate of finished products, The effect of reducing production loss

Inactive Publication Date: 2012-07-25
辅讯光电工业(苏州)有限公司 +1
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  • Claims
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Problems solved by technology

In the process of screen printing, due to factors such as printing equipment, personnel operation, and production environment, it is easy to cause misalignment of the printing position of the screen
Deviations between the dot position and the design value will result in poor display quality, so it is often necessary to use a magnifying glass or a 3D measuring instrument to measure the size to determine whether the ink dot position of the light guide plate is accurate
In the production process, due to the time required for measurement, when an abnormality is found, a large number of defective products have been produced on the production line, which will cause a lot of waste
In addition, due to the different structural design of the backlight module, the dot spacing value is not fixed during the optical design of the light guide plate, so that the dot positioning size of different light guide plates is different. The size of the light guide plate of each model needs to be defined, which cannot achieve simplified production. line management

Method used

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  • Light guide plate, display device and detection method for printing positioning of light guide plate
  • Light guide plate, display device and detection method for printing positioning of light guide plate
  • Light guide plate, display device and detection method for printing positioning of light guide plate

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Embodiment Construction

[0019] Please refer to figure 1 , figure 1 It is a schematic diagram of a light guide plate according to a specific embodiment of the present invention. In this specific embodiment, a light guide plate 10 is provided, and a dimming pattern 11 is printed on its surface. The dimming pattern 11 can be an ink dot matrix or a grid, which is well known to those skilled in the art and will not be repeated here. The dimming pattern 11 has a set first offset tolerance. When the offset of the printing position of the dimming pattern 11 on the light guide plate 10 is greater than the first offset tolerance, the dimming pattern 11 will be too large due to the position offset. If it does not meet the design requirements, the first offset tolerance is a horizontal tolerance or a longitudinal tolerance, and this embodiment is described by taking the first offset tolerance as a longitudinal tolerance as an example. The surface of the light guide plate 10 includes a first side 12a and a seco...

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Abstract

The invention relates to a light guide plate, a display device and a detection method for printing positioning of the light guide plate. A dimming figure is printed on the surface of the light guide plate and has set first offset tolerance, the surface of the light guide plate is provided with a first lateral side and a second lateral side opposite to the first lateral side, a first strip-shaped positioning reference figure and a second strip-shaped positioning reference figure are further printed on the surface of the light guide plate, the first positioning reference figure is parallel to the first lateral side, the second positioning reference figure is parallel to the second lateral side, and the sum of the distance between the inner lateral side of the first positioning reference figure and the first lateral side and the distance between the inner lateral side of the second positioning reference figure and the second lateral side is the double of the first offset tolerance. The dimming figure and the positioning reference figure are printed on the surface of the light guide plate together, whether printing positioning of the dimming figure meets the set offset tolerance or not can be simply judged by means of visual testing according to whether the positioning reference figures are imperfect or not, and the problem of difficulty in detecting printing positioning of the light guide plate is solved.

Description

technical field [0001] The present invention relates to a light guide plate, a display device, and a detection method for printing positioning of the light guide plate, in particular to a light guide plate, a display device, and a detection method for printing positioning with a positioning reference map for visual inspection. Background technique [0002] Liquid crystal display devices are currently the most widely used flat display devices, such as mobile phone display screens, liquid crystal displays, and liquid crystal televisions. The backlight module is one of the important components of the liquid crystal display device. Generally speaking, the backlight module is composed of a light guide plate, a diffusion sheet, a reflection sheet, and a light source. The light guide plate is used to guide the light generated by the light source to the display panel. After the light passes through the display panel, the user can see the content displayed on the liquid crystal panel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02F1/13357G01M11/02
Inventor 蒙世创郝朝响
Owner 辅讯光电工业(苏州)有限公司
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